Clutch and brake for powertransmitting mechanisms



April 17, 1951 'w SCHULTZ 2,549,245

CLUTCH AND BRAKE FOR POWER TRANSMITTING MECHANISMS Filed May 9, 1947 2 SheetsSheet l INVENTOR.

ATTORNEY April 17, 1951 w. P. SCHULTZ CLUTCH AND BRAKE FOR POWER TRANSMITTING MECHANISMS Filed May 9, 1947 2 Sheets-Sheet 2 INVENTOR. {Z a/7E2 f? Jc/w/fiz .ATTGRNEY I Patented Apr. 17, 1951 UNITED STATES PATENT OFFICE CLUTCH AND BRAKE FOR POWER- TRANSMITTING MECHANISMS Walter P. Schultz, Saginaw, Mich.

Application May 9, 1947, Serial No. 747,021

, easily operated with a minimum efiort by the operator.

Another object is to provide a power transmitting mechanism which can be easily mounted, which can be readily assembled and disassembled, and which is adjustable to difierent levels to permit alignment of clutch assembly and motor and to accommodate different size motor,

frames.

A further object is to design a power transmitting mechanism including a clutch and driving motor, and means associated therewith for quickly stopping rotation of the mechanism or machine to which it is attached.

A further object is to. design a compact power transmitting mechanism composed of few parts,

I on the under side of the table T is a split hub 8 all of which are of sturdy construction and deslgn.

With the above and other objects in view, the present invention consists in the combination and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportion, and minor details of construction, without departing from the spirit, or sacrificing any of the advantages of the invention.

In the drawings:

Fig. 1 is a side-elevational view of a sewing machine table showing my power transmitting mechanism mounted thereon and operatively connected to a motor clutch in engaged position.

Fig. 2 is an end-elevational view thereof.

Fig. 3 is a view similar to Fig. 1 showing the mechanism in disengaged position.

Fig. 4 is a detail, side-elevational view of the clutch supporting member.

Fi 5 is an end-elevational view thereof.

Referring now more specifically to the drawings in which I have shown the preferred embodiment of my invention, the letter Tfiindicates the sewing machine table on which a sewing machine (not shown) is mounted. Mounted which is secured in position by means of bolts 9 or the like, a clutch supporting member I 0 is suspended in the hub 8, and is formed with a post II which is received in the hub, and a bolt I2 serves to securely clamp the post in the hub, said post being raised or lowered to accommodate different size motor frames.

The member In is centrally bored as at I3 andaccommodates the sleeve I4 in which a shaft I5 is journaled, a sheave I6, having its hub I6 mounted on the one end of the shaft, and a belt I l is trained thereover and leads to the sewing machine (not shown) provided on the table.

A split thrust arm I8 is fixedly mounted on the sleeve l4 directly adjacent the member Ill, and is clamped in position thereon by means of a bolt I9, a link 20 being connected to the free end of said arm, and the lower end of the link is connected to one end of the treadle L which is piv-- otally mounted at the point 2|.

A clutch plate 22 is mounted on the other end of the shaft I5, said plate being formed with a hub 23, and a setscrew 24 serves to secure it in position, a clutch lining 25 being mounted on the face of said plate and drivingly engages a lining mounted on a face plate 21, which plate is also formed with a hub 28, and ascrew 29 serves to secure it on the motor shaft which is driven from the motor M. Thus, the sleeve I4 is arranged on the shaft I5 with its ends in thrust engagement with the hubs I6 and 23 of the sheave IE and disk 22 respectively, such that relative rotational movement is permitted but relative endwise movement is prevented.

A bracket 3| is adjustably secured to the lower face of the supporting .member Ill by means of screws 32, and a strip of brake lining 33 is mounted in the one face of said bracket for engagement with one side of the clutch plate 22 when the motor is disconnected.

An angular slot 34 is provided on the supporting member ID, and a drive pin 35 extends therethrough and has threaded engagement with the sleeve member I4, a spring member 31 being connected to said drive pin, and to the bolt I2 respectively, so that there is a continuous tension to hold the mechanism in disengaged position as clearly shown in Fig. 3 of the drawings.

The operation of the machine is substantially as follows:

With the mechanism in disengaged position as shown in Fig. 3 of the drawings, the operator first depresses the treadle L which is pivotally connected to the floor or other support; this actuates the thrust arm, swingin the free end of the thrust arm downwardly and simultaneously moving the pin 35 from the top to the bottom of the angularly disposed slot 34, this movement forces the pin 35 upwardly in the angularly dis- 4 7 member mounted on said hub, a horizontally disposed sleeve rotatably mounted in said supporting member, an angularly disposed slot in said supporting member, and a pin mounted in said sleeve and projecting through said slot, a thrust arm fixedly mounted on said sleeve, a drive shaft journaled in said sleeve, a pulley on one end of said shaft, and, a clutch plate on the opposite end thereof,; said pulley and clutch plate holding the sleeve between them against relative axial movement'and forming thrust surfaces for said sleeve,

posed slot 34, this swings the treadle and thrust arm upwardly and moves the sleeve M axially in the support iii to force the clutch member to disengaged position, and the one face of the plate f thrust'arm'so as to axially shift the clutch plate 22 into frictional engagement withithe brake lin-. ing 33 thus quickly arresting the motion of the mechanism. a

i The angle of the slot 34 determines the axial travel of the sleeve, and the spring 14 exerts a continuous tension to pull the pin upwardly and the clutch 25 to disengaged position.

The mechanism is (ifturdy, substantial design; the supporting means is adjustably suspended from the table, it can be easily mounted and demounted and requires but very little maintenance.

From the foregoin description,it will be clear- 1y obvious that I have; perfected a very simple,

practical and inexpensive adjustable power transmitting, mechanism for driving sewing machines and small industrial tools and the like.

' What I claim is z 1 Anadjustable power transmitting mechanism of the class described including, incom- I bination, a table, a support, a clutch element supporting member mounted thereon, a sleeve, journaled in said supporting member, a shaft rotatably mounted in said sleeve, an angularly disposed slot in said supporting member, a drive pin at in said slot and anchored to said sleeve, a thrust arm; on the sleeve adjacent said supporting member, a clutch plate on one end of the shaft, driving means in alignment with said shaft, a pulley secured to the other end of the shaft, saidpulley and clutch plate holding the sleeve between them against relative axial movement and forming thrustsurf'aces for the sleeve, manually operable means for moving the thrust arm so as to axial- 1;? shift said sleeve and the clutch plate into driving engagement with, said driving means, and resilient means connectedto said drive pin andsupport respectively for rotating said sleeve and shifting the clutch plate out of driving engagement ,with said, driving ,means when the thrust arm is released,

2. .An adjustable power transmitting mechanism including in, combination, a table, a hub secured thereto, a clutch element supporting drivingmeans in horizontal alignment with said shaftfma'nually operable means for moving the into driving engagement with the driving means,

and resilient means connected to said pin and hub respectivelyfor holding said shifting means in disengaged position when manually operable means is released.

3. An adjustable power transmittin mechanism of the class described including in com bination, a table, a support secured; to the underside of, said table, a clutch supporting member carried by said support and having an angularly disposed slot therein, a sleeve journaled in said supporting member, a drive pin on aid sleeve and projecting through said angularly disposed slot, arotatable shaft inseid sleeve, a thrust arm on one end of said sleeve, a clutch plate securedv to one end of said shaft, driving means in alinement therewith, a pulley ecured to the other end. of said shaft, said' pulley and clutch plate holding the sleeve between them against relative axial movement and forming thrust surfaces for. said sleeve, manually operable means for axially shift; ing said sleeve and clutch plateinto driving engagement with said driving means, resilient spring means connected to said drive pin and support for shifting said sleeve and clutch plate out of drivns e m n Withsaid riving, means. a br ke ec r d o h lower faceof. he c utch pp rtin member and a brake member adjustably,

mounted on said bracket, said brake member being positioned to engage, one faceof the, clutch, plate when the manually operable means released under the yielding actio f said'splfins means to shift the mechanism to, its disen aged. position.

WALIEB,.P., SCHULTZ.

REFERENCES CITED The following references are of record in the file of this patent: I

UNITED STATES PATENTS an. Jan. 6., 9 

